Function library
Positioning control
3.4.8 Homing
3−50
l
EDSVS9332P−EXT DE 2.0
3.4.8.5 Homing modes 2 and 3
Purpose
l Homing in absolute positioning mode (C1210 = 0, 2), with finite traversing range and existing
travel range limit switches (POS−LIM−xxx).
l The homing switch (POS−REF−MARK) is always found. In the worst case the entire traversing
range will be searched.
Approach end of travel range limit switch, reverse and move to reference point via homing
switch
Mode 2: Traversing direction to positive end of travel range limit switch
Set C1213 = 2.
Homing switch (POS-REF-MARK)
Zero pulse / Zero position
End of
travel switch
(POS-LIM-POS)
Home position
End of
travel switch
(POS-LIM-NEG)
9300pos053
Fig. 3−17 Move to POS−LIM−POS, reverse, move to reference point via POS−REF−MARK
Function sequence
l Move to positive travel range limit switch with homing speed C1242.
l Reverse there and move beyond the reference switch to the reference point with homing
speed C1242. In this case no fault (PO2) is indicated!
l The reference point is at the first zero pulse / zero position of the position encoder after leaving
the homing switch.
l If the drive is already on the positive end of travel range limit switch before homing, it is
reversed immediately.
l If the drive is positioned at the reference switch when homing is started, the switch will be
overtravelled. The drive then goes on to the limit switch and reverses there.
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